Molding-machine.



PATENTED JUNE 23, 190a.

' G. DUNKEL. I

' MOLDING MACHINE. 4 APPLICATION FILED MALES, 1907.

ZSHEB'IS-SHEBT 1.

BATENTED JUNE 23 G. DU'NKEL. MOLDING MACHINE.

APPLIUATION FILED HAR.28,1907- -2 SHEETB-SHEE' 2.

Wlnessea:

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GOTTLIEB DUNKEL, OF GORLITZ, GERMANY.

MOLDIN G-MAGHIN E Specification of Letters Patent.

Patented June 23, 1908.

Application filed March 28, 1907. Serial No. 365,201.

To all whom it may concern:

Be it known that I, GOTTLIEB DUNKEL, chief engineer, residing at N o. 15Gartenstrasse, in Gorlitz, Kingdom of Prussia, German Empire, haveinvented certain new and useful Improvements in or Relating toMolding-Machines, of which the following is the specification.

This invention relates to a molding machine for manufacturing cores withplates, vanes, paddles and the like which have to be cast in. Themanufacture of the cores is effected in such manner that they are builtup of small-core pieces strongly rammed together, the plates, vanes,paddles and the like embedded in them, subsequently to be cast in, beingheld firmly in exact position in order to prevent the formation of bursin the casting at the joints of the plates, paddles, vanes, etc. Themold for the plates arranged between the spaced lates or the like, isformed by patterns Whic are adjustable in accordance with the shape ofthe whole core, so that the core pieces can be consecutively producedbetween them.

A construction of a machine embodying the invention is illustrated, byway of example, in the accompanying drawing.

Figure 1 is a front elevation, Fig. 2 a plan partly in horizontalcross-section, Figs. 3 and I 4 are detail views.

To a bottom plate a of any desired size, is secured a vertical standardI). On the latter is revolubly mounted an arm 0 balanced by a weight d.On the arm 0 is mounted a carriage or slide 6 which can be manually adju'sted by means of a screw-threaded spindle f, in such manner as to bebrought nearer to, or further away, from the standard I). Thisarrangement serves to adjust with precision the distance of the centerof the cores to be produced, from the axis of the standard I). On theslide a are mounted twp jaws g g guided in a horizontal guide andprovided with toothed racks h h by means of which, and of a toothedWheel t engaging with them, they can be brought nearer together orfurther apart by means of a lever 7c. On the jaws g g are carriedpattern blocks or pieces 1" 1" respectively, and under them, patternpieces 25 t of which the inner opposed faces are made as the arcs ofconcentric circles. The patterns 25 t form the mold for the main core Z,and the patterns 1* rthe mold for the core pieces m (Figs. 3 and 4)which are laced between the spaced vanes 19 and ho d the I latter durincasting. The mold blocks r r are provi ed with recesses a u in which:the vanes engage during the molding, so that they project at both sidesfrom the rammed core, and are surrounded by the metal poured in.

The working of the molding machine is as follows :The distance that isto be maintained between the small cores m, that is between the plates,vanes 19 and the like, is marked on the plate a as shown by the lines 88 8 Fig. 2. Then the slide 6 is moved by means of the standard f awayfrom the spindle b to the exact distance at which the line of the coresis required to be from the axis 6.

Then the jaws g g are set by means of the lever 76 at such relativedistance that the pattern pieces t 23 form a mold for the core piece Zto be produced, of square, rectangular or other cross-section of adefinite length. The sand is then rammed in between them, and the maincore Z thus produced. The arm 0 is then adjusted in such manner that theindex n secured to the outer cheek t, points to the second division line8, reckoning from the end of thecore piece Z. To the end of the maincore Z a pattern piece 0 is then secured, so that the pattern pieces 1*1" form with the said pattern piece 0, an empty space which is rammedfull of sand, and forms the core 'm situated between two vanes. Then thelever 7c is brought into the position shown in full lines in Fig. 1, andthe patterns r r moved apart, so that the core m just made, isuncovered, whereupon the arm 0 is turned to such an extent that theindex n points to the next division line 8 whereupon a vane p is placedon the core piece m just rammed, and by bringing. the lever 76 into thebroken line position shown in Fig. 1, the wood blocks r are againbrought nearer together, so that they surround the vane p with theirrecesses u u and form round it an empty space which again is rammed withmolding sand. The blocks are again moved apart, the arm 0 is advanced tothe extent of one division, the neXt vane put on, and the blocks againmoved towards each other. The space thus produced, is again rammed fullof sand, and so on, until the core with the projecting pieces to be castin, has reached the desired length. Then the outer casing mold is builtround the said core carrying the vanes to be cast in, or the core is putinto the said outer casing, so that the metal to be introduced flowsround the ends of the vanes,

and therefore the latter are embedded in the casting.

For manufacturing cores which are not circular it is, of course, merelynecessary to and in what manner the same is to be per formed, I declarethat what I claim is 1. In a molding machine for forming successivecores between plates, vanes and the like to be cast in, a lurality ofpattern ieces adjustable to and 150m each other, an progressivelyformed.

2. In a molding machine for forming a circle of successive cores betweenplates, vanes and the like to be cast in, a plurality of pattern piecesadjustable to and from each other in a radial direction, andprogressively formed in the arc of a circle.

3. In a molding machine, the combination of a bed plate, a slideadjustable progressively and angularly thereof, jaws adjustably mountedon the slide, and pattern pieces carried by the jaws.

4. In a molding machine, the combination of a bed plate, a slideadjustable rogressively and angularly thereof, jaws a justably mountedon the slide, pattern. pieces carried by the jaws, and a scale to gagethe progressive movement of the slide over the bed plate.

5. In a molding machine, the combination of a bed plate, a slideadjustable rogressively and angularly thereof, jaws adjustably mountedon the slide, and pattern pieces carried by the jaws, the pattern piecesprovided on their opposed faces with means forreceiving plates, vanesand the like to be cast in.

6. In a molding machine, the combination of a bed plate, a slideadjustable rogressively and angularly thereof, jaws a justably mountedon the slide, and pattern pieces carried by the jaws, the pattern piecesprovided on their opposed faces with means for receiving plates, vanesand the like to be cast in, and a scale with graduations'spaced apart adistance equal to the face of the pattern pieces plus the thickness ofthe inserted plate, vane and the like.

7. In a molding machine, the combination of a bed plate, a slideadjustable progressively and angularly thereof, jaws adjustably mountedon the slide, racks fixed to the jaws, a pinion engaging the racks toadjust the jaws to and from each other, and pattern pieces carried bythe jaws.

8. In a molding machine, the combination of a circular bed plate, acentral'standard, an arm carried thereby and revoluble thereabout, aslideradially adjustable on the arm, jaws mounted on the slide, means toadjust the jaws to and from each other, and pattern pieces carried bythe jaws.

9. In a molding machine, the combination of a circular bed plate, acentral standard, an arm carried thereby and revoluble thereabout, aslide radially adjustable on the arm, jaws mounted on the slide, meansto adjust the jaws to and from each other, )attern pieces carried by thejaws, and a sca e with radial graduations to gage the progressiverevolution of the arm to form successive cores of a predetermined size.

10. In a moldin machine, the combination of a circular bed plate,acentral standard, an arm carried thereby and revoluble thereabout, aslide radially adjustable on the arm, jaws mounted on the slide, meansto adjust the jaws to and from each other, pattern pieces carried by thejaws, the pattern pieces provided on their opposed faces withrneanstoreceive plates, vanes and the like to be cast in between successivecores, and a scale with radial graduations spaced apart equal to theface of the pattern pieces plus the thickness of the inserted plate andthe like.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GOTTLIEB DUNKEL.

Witnesses THEODOR WEICHOLD, MARTHA Mr'inLrscn.

